VRF Conditioning System for Simultaneous Air and Water Heating
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Solution Overview
Problem
Conventional Variable Refrigerant Flow (VRF) conditioning systems are limited to controlling room temperatures and cannot simultaneously heat or cool air and liquids, requiring separate systems for air and liquid temperature control.
Innovation Solution
A VRF conditioning system with a single outdoor unit and multiple terminals, where one terminal conditions air and another terminal heats or cools liquids, using a main controller to vary refrigerant supply based on demand, allowing simultaneous air and liquid heating or cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional VRF conditioning system is used to condition air in multiple rooms, then energy savings and independent temperature control are achieved, but the system cannot heat or cool liquids requiring separate dedicated systems
Solution Approach 1:
The VRF conditioning system is modified to perform multiple functions: it can condition air in rooms (original function) and simultaneously heat or cool liquids (new function). The system includes both air-handling terminals and liquid-heating/cooling terminals connected to the same outdoor unit, allowing a single system to serve both air conditioning and water heating/cooling needs, thereby eliminating the requirement for separate dedicated systems.
2Adaptability or versatility
If multiple dedicated systems are installed for air conditioning and water heating/cooling, then air and liquid temperature control are achieved, but system complexity and installation costs increase
Solution Approach 1:
The patent merges the air conditioning system and the water heating/cooling system into a single integrated VRF system. Both air terminals and liquid terminals share common components including the outdoor unit with compressor, condenser, and expansion devices. This consolidation reduces the total number of systems, simplifies installation, and lowers overall system complexity while maintaining independent control capabilities for both air and liquid temperature regulation.
3Use of energy by moving object
If separate systems are used for air conditioning and water heating, then each system can be optimized for its specific function, but energy efficiency and cost savings are reduced
Solution Approach 1:
The system implements heat recovery by capturing waste heat from air-conditioning operations and redirecting it to heat water, or by using heat from water heating operations to pre-condition air. The controller monitors thermal conditions and redirects refrigerant flow to transfer heat between air and water streams, converting what would be wasted energy into useful thermal energy for water heating or air pre-conditioning, thereby significantly improving overall system energy efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and precise temperature regulation of both air and liquids, reducing the need for multiple systems and providing energy savings through integrated air and liquid temperature control.
Implementation Method 1
The refrigerant can be configured to flow through heat exchangers of the first terminal and heat exchangers of the second terminal
Implementation Method 2
The refrigerant can be configured to flow through heat exchangers of the first terminal and heat exchangers of the second terminal
Data Source
AI summary
Embodiments include systems and methods for heating water and cooling air simultaneously, as well as other simultaneous heating and cooling operations. An example variable refrigerant flow conditioning system includes an outdoor unit having a compressor, a condenser coil, and a fan, a water heater coupled to the outdoor unit, a first air conditioning unit coupled to the outdoor unit, and a controller. The controller may be configured to determine that a cooling operation mode is active during a first time interval, cause vapor refrigerant to be directed from the outdoor unit to the water heater and liquid refrigerant to be directed from the outdoor unit to the first air conditioning unit, determine that a heating operation mode is active during a second time interval, and cause the vapor refrigerant to be directed from the outdoor unit to both the water heater and the first air conditioning unit.